Radian Group Inc. (NYSE:RDN): The credit enhancement company's fourth quarter losses increased. In the same period last year, its earnings included higher gains from the fair value of derivatives. Radiant insures mortgages when a borrower pays less than 20 percent in down payments. Radian shares dipped 4.91 percent to $6.39 in the early session.

US Airways Group, Inc. (NYSE:LCC): The company has intensified talks with American Airways for a possible merger that could be announced this week. The US Airways pilots union said, Friday, that the pilots have approved a labor agreement that will make the combination smoother. Experts say the government is unlikely to raise any objections on the deal. Shares rose 0.34 percent to $14.80 in early market trading.

Gulfport Energy Corporation (NASDAQ:GPOR): The oil and natural gas producer is acquiring 22,000 acres in the Utica Shale of eastern Ohio for about $220 million from Windsor Ohio LLC. Bullish on the new energy sources, Gulfport continues to increase its presence in the shale region. The markets responded negatively to the news and shares dipped 3.75 percent to $39.74 in early session.

Harvest Natural Resources, Inc. (NYSE:HNR): The petroleum exploration and production company announced that it has made another oil discovery in the West Africa's presalt offshore Gabon. Shares initially rose 4.9 percent to $9.50, but later dipped to $9.01 in early trading.

American Capital Mortgage Investment Crp (NASDAQ:MTGE): The company announced fourth quarter results that were above analysts' estimates. The real estate investment trust said it has already prepared for Quantitative Easing 3, and positioned its portfolio appropriately. Shares surged 4.36 percent to $26.56 in early market trading.

Another company to watch out for is Brookfield Asset Management Inc. (NYSE:BAM). The oil and gas transporter's fourth quarter profits rose 26 percent as the company reported growth across all segments.